baber/WOPTO huggingface dataset:
Patent GB-1402802-A (GB)
Title: Process for polymerizing olefins
IPC: C08F4/00
Filed: 1973-01-22
Abstract: 1402802 Polymerization of olefins MITSUBISHI CHEMICAL INDUSTRIES Ltd 22 Jan 1973 [22 Jan 1972] 3094/73 Heading C3P An olefin is polymerized in a non polar hydrocarbon diluent in a reaction vessel in the presence of a catalyst and a modifier which reduces the tendency of the resulting polymer to adhere to the reaction vessel, the modifier being a salt of A. an organic acid selected from salicyclic acid substituted with at least one alkyl group containing more than 8 carbon atoms, dicarboxylic acid diesters containing a sulphonic acid radical and acids having the formula where R is a hydrocarbon group, Y is -CH 2 -, or -CH 2 CH 2 OCH 2 CH 2 -, A 1  is a radical containing a carboxyl group, A 2  and A 3  are the same or different and are (CHR<SP>1</SP>CHR<SP>1</SP>O) p H (where p is an integer R<SP>1</SP> is H or C 1 -C 4  alkyl) or a radical containing a carboxyl group, a is an integer, X is an anion and C represents zero when A 2  and A 3  represent a radical containing a carboxyl group which forms an internal salt with the quaternary nitrogen or 1 when such an internal salt is not formed: and B an alkaline earth metal, Cu, Zn, Cd, Al, Pb, Cr, Mo and Mg, said salt having a molecular weight of at least 300. The catalyst may be a Phillips or Ziegler catalyst and may be a catalyst-polymer mixture prepared by preliminary polymerization of an olefin in the presence of the catalyst. In the examples ethylene is polymerized continuously in hexane in the presence of hydrogen using as the catalyst AlEt 3  or Al isoBu 3  and T 1 Cl 3 1/3AlCl 3 , the reaction product of (T 1 Cl 4 , AlisoBu 3  and MgOHCl), of (n-propyltitanate, VOCl 3  and Et 2 AlCl), of (VO(OnBu) 3 , T 1 Cl 4  and ethyl aluminium sesquichloride) or of (T 1 Cl 4 , VO- (OnBu) 3  and Bu 3 SnCl; or chromium oxide supported on silica used alone or together with AlEt 3  or Et 2 AlOEt and as the modifier a solution of one of more of chromium C 14 -C 18  alkyl salicylates, calcium di-2-ethylhexyl sulphosuccinate and a magnesium salt of a tertiary amine of the above formula where R is C 11 H 23  which in some cases also contains a polyelectrolyte which is a copolymer of 2-methyl 5 vinyl pyridine and a C 17  alkyl methacrylate and propylene is continuously polymerized in hexane using as catalyst a mixture of T 1 Cl 3 <SP>1</SP>/ 3 AlCl 3 , hexamethylphosphorictriamide triisobutylaluminium and Et 2 AlCl and a modifier solution defined above. In some examples the catalyst used is a mixture thereof with polyethylene prepared in a preliminary polymerization step.
Patent GB-814776-A (GB)
Title: Clamshell bucket-turning mechanism for bulk material handling apparatus
IPC: B66C13/00
Filed: 1957-01-29
Abstract: 814,776. Overhead travelling cranes handling grabs. WELLMAN ENGINEERING CO. Jan. 29, 1957 [June 18, 1956], No. 3159/57. Class 78 (4). The sheaves 15 ... 18 (Fig. 2) by which a grab is suspended from the carriage 20 of an overhead crane are pivoted to a member 60 which can be turned to turn the grab while maintaining its cables in their proper positions. As illustrated each sheave is carried in a housing 50 pivoted about an axis 58 (Fig. 8) coincident with the vertical run of the cable 14. The housing is guided by a pivotal connection 67 with a shoe 68 engaging a guide 70 (Fig. 2) on the carriage 20 so that the sheave takes up the proper position to receive its cable when the member 60 is turned anti-clockwise through a right angle. The movement of the member 60 is limited by an abutment 90 engaging fixed stops 91, 92, and a disc 40 secured to the member 60 has a portion 82 for engagement by catches 80, 81 which can be turned about pivots 77, 78 on the carriage, against biasing springs, when a rail 100 sliding on the crane boom is. moved inwardly to engage rollers 95, 96 on the tails 75, 76 of the catches. The member 60 is turned, when the catches have been released, by pulling either on the holding line 12 or on the closing line 14, and its movement is damped by brake shoes 115 pressed into engagement with the disc 40 by the tails 75, 76 of the catches.
Patent GB-679500-A (GB)
Title: Improvements in or relating to fuel supply systems for internal combustion engines
IPC: F02D19/06
Filed: 1950-02-09
Abstract: 679,500. Spray carburetters. ELSTON, J. E. Feb. 23, 1951 :[Feb. 9, 1950], No. 3315/50. Class 7(iii) Valves 11 a, 12a controlling the.changeover from light to heavy fuel are actuated by a, plate 14 pivoted at 15 and connected by a spring 18 to a snap-over mechanism comprising a crank-shaped member 17'pivoted at 17a and connected to a bellows 21a actuated >by an engine temperature responsive device. The valves 11a, 12a control the supply of fuel from light and heavy fuel tanks into the casing 10 having an outlet 13 connected to a carburetter float-chamber. The casing 10 is provided with a drain plug 25 and a transparent removable cover plate. The apparatus may be installed within a float-chamber, and the valve 11a, 12a may be spring- loaded. The Provisional Specification describes modifications in which the fuel flow into the apparatus is controlled by a cock or slide valve.
Patent GB-628637-A (GB)
Title: Improvements in or relating to resonant bridge circuits for harmonic analysis
IPC: G01R17/10
Filed: 1947-02-06
Abstract: 628,637. Current and voltage measurements and measuring apparatus. SOC. INDUSTRIELLE DES PROCEDES LOTH. Feb. 6, 1947, No. 3542. Convention date, June 7, 1943. [Class 37] To determine the ratio between the amplitude V of the fundamental and the resultant Vm of the amplitude of all harmonics of a complex oscillation, the oscillation is applied to a bridge designed to be balanced at the fundamental frequency and having one arm 5, 6, 7 resonant at the fundamental and another arm 8 constituted by a resistance, and a voltmeter is connected across arm 8 to measure V and across diagonal 2, 4 to measure Vm. Preferably resistances 7, 8, 9, 10 are equal. The impedance of arm 1, 2 at frequencies other than the fundamental is so relatively high that the voltage across arm 8 is substantially equal to ¢ V and therefore the voltage across 2, 4 is substantially ¢ Vm.
Patent GB-379621-A (GB)
Title: A combined stopper and pipette for bottles and the like
IPC: B01L3/02
Filed: 1932-02-06
Abstract: 379,621. Pipettes. DYKEMA, T. J., 808, South Millvale Avenue, Pittsburg, U.S.A. Feb. 6, 1932, No. 3609. Convention date, Feb. 7, 1931. [Classes 125 (i) and 125 (iii).] A combined stopper and pipette for bottles comprises a screwed cap 7 which holds frictionally the flange 3 of an elastic bulb 1; a glass tube 6 depends from the flange 3.
Patent GB-548697-A (GB)
Title: Improvements in or relating to cathode ray tubes
IPC: H01J31/34
Filed: 1941-03-17
Abstract: 548,697. Cathode-ray tubes. MILLER, H. March 17, 1941, No. 3609. [Class 39 (i)] In a cathode-ray tube provided with electrostatic deflecting means immersed in an axial magnetic field, the deflecting means or the magnetic field are so constructed that the path of the electrons in the deflected beam is separately controllable in different portions of the electrostatic deflecting field whereby an increase in the transverse velocity components of the beam during transit through the deflecting field can be avoided. In one form, the deflecting plates 7, 8, Fig. 1, are split up into two portions separated by a gap 13 and different mean D.C. potentials are applied to the portions, for example by centre-tapped potential dividers, so that the number of cycloidal loops executed by the electrons can be adjusted to reduce the dispersion of the spot on the screen 9 to a minimum. As shown the length of the portions is preferably in the ratio of 1:2, so that the gap 13 occurs at the beginning of the region of maximum field intensity, but ratios of 1:1 and 1: 3 may be used. The plates may be divided into more than two portions. In a modification, Fig. 3 (not shown), the axial field of coil 2 is supplemented in the entrance region of the deflecting field by the localized magnetic field of an independently-excited short coil. Specifications 478,666, 530,409 and 542,219 are referred to.
Patent GB-565785-A (GB)
Title: Improvements in or relating to electric signalling systems
IPC: H04Q1/18
Filed: 1943-03-05
Abstract: 565,785. Electric selective signalling. STANDARD TELEPHONES & CABLES, Ltd. (International Standard Electric Corporation). March 5, 1943, No. 3635. [Class 40 (i)] [Also in Group XXXIX] In a system of signalling in accordance with phase, signal and reference currents are applied to a mixing circuit by means of a hybrid coil arrangement T1, Fig. 9. The signalling and reference currents may be sinusoidal or rectified A.C. or A.C. with successive half-cycles unsymmetrical or rectangular pulses and may produce an effect when the current from the mixing circuit exceeds a predetermined value or falls to zero. The application of the invention to the control of a group selector by a register-controller is described in Specification 555,530, [Group XXXIX]. The output of the mixing circuit may be amplified and rectified and fed to the control gap of a cold-cathode discharge tube or, where the signal currents have an unsymmetrical wave form, may be amplified and fed to the control gaps of two tubes, as shown in Fig. 9. In the application to selective signalling, Fig. 10, signals are fed in parallel to a number of mixing circuits SD1, SD2, &c., each of which is fed with a reference current of a different phase and when a signal of a particular phase is received, a relay SR1, SR2, &c. lights the corresponding lamp.
Patent GB-212059-A (GB)
Title: Improvements in boxes and cases
IPC: B65D45/16
Filed: 1923-02-07
Abstract: 212,059. Macintosh, R. Feb. 7, 1923. Lids, tampering with, preventing and detecting; corner joints.-The lid of a box or case has two sets of hasps 2a, 4a which are respectively engageable with tongues 2 projecting inwards from the front of the box and with tongues 4 forming parts of hinges 3 on the back of the box. The tongues 4 are first engaged with the hasps 4<a> and the lid is then swung on the hinges, until the hasps 2 register with the tongues 2<a> when the lid is slid forwards on the tongues to complete the closing thereof. The lid is locked bv bars 6 screwed to the back of the box and engaging against the back of the lid, the screws 8 securing the bars being sealed at 9. Supplementary hasps 10<a> may be fitted to the sides of the lid to engage corresponding tongues 10 on the ends of the box. The sides and base of the box are connected together by straps 11<a> on one part engaging T-headed strips 11 on an adjacent part, the heads of the strips being engaged beneath slots in offset portions of the straps before the strips are secured to the box.
Patent GB-701374-A (GB)
Title: Improvements in gas-heated grills
IPC: A47J37/06
Filed: 1950-02-14
Abstract: 701,374. Gas-heated grills. CANNON INDUSTRIES, Ltd., and OATLEY, A. F. Feb. 5, 1951 [Feb. 14, 1950]. No. 3706/50. Class 126 A gas-heated grill has the burner tube along one edge with the gas jets directed across a metal fret supported from the burner and downwardly directed at its outer part, and a heat reflecting plate closely spaced above the fret beneath a cover plate, the outer edge of the fret being outwardly bent to rest on a ledge formed on the reflecting plate. An expanded metal fret 14 is supported at its outer longitudinal edge by a heat reflecting plate 16 to one side of a burner tube 10. The fret 14 has a longitudinal trough 14c which may be spot-welded to the reflecting plate 16. The burner 10 has gas jets 13 along one side only, which are directed slightly downwards, and are graduated in size from the nozzle end of the burner tube 10 so that an equalized gas supply is obtained along the whole length of the burner. The fret rests on the supports 15 formed on the burner tube 10 so that an air supply space is left below the fret. A cover 17 spaced from the heat reflecting plate and provided with elongated holes at its ends is secured to brackets 12 at each end of the burner tube by screws 18 passing 'through elongated holes in the reflector plate 16 so that the cover 17 and reflector 16 can expand. The space between the cover 17 and reflector 16 may be filled with insulating material. Specifications 675,974 and 688,262 are referred to.
Patent GB-215438-A (GB)
Title: Improvements in suspended arches more especially for furnaces and the like
IPC: F23M5/06
Filed: 1923-02-07
Abstract: 215,438. Woods, J. Feb. 7, 1923. Arches.-A suspended arch of the kind comprising blocks having in their upper faces undercut recesses engaging with a superposed metal framework is formed by groups of blocks separated by spaces which permit the removal of blocks of adjacent groups, such spaces being normally closed by removable filling blocks. The invention although generally applicable to suspended arches is particularly adapted to furnace arches. As shown in Figs. 1, 4 and 5, a furnace arch is supported by transverse joists a and longitudinal beams c the lower edges of which are provided with flanges c<2>, adapted to engage with recesses in the blocks d. The flanges and webs of the beams c are gapped at c<5> to permit the insertion and removal of the blocks d, the gaps being filled by blocks e which are provided with T-shaped heads resting on the upper surfaces of the blocks d. The lateral faces of the filling blocks e are cut away at e<2> for a portion of their depth. Across the front end of the arch are arranged blocks f provided with recesses f<1> engaging with flanges g<2> in beams g, g<1>. The flanges g<2> are interrupted at intervals to permit the insertion and removal of the blocks and the gaps are closed by filling blocks having T-shaped heads h<1> adapted to rest on the blocks f. The rear end of the arch is supported by beams i and comprises blocks j having projecting portions j<1> adapted to engage with superposed blocks k having undercut recesses engaging with projecting flanges of the beams i. The beams i and blocks k serve to support the blocks forming the front wall of the furnace in addition to the girders.
Patent GB-137406-A (GB)
Title: Improvements in connection with boots and shoes
IPC: A43C15/16
Filed: 1919-02-15
Abstract: 137,406. Shaw, J. Feb. 15, 1919. Soles.-The tread surface of a sole or heel is recessed to receive a metal plug e which is internally threaded to engage a screw c; the plug normally lies wholly within the recess, but may be rotated to project beyond the tread surface. In a modified construction, the plug, which may have a pointed or truncated end, fits into an internally threaded socket.
Patent GB-747601-A (GB)
Title: Improvements in and relating to electric switching arrangements
Inventor: LEVY MAURICE MOISE
IPC: H04Q3/00
Filed: 1950-02-14
Abstract: 747,601. Automatic exchange systems. GENERAL ELECTRIC CO., Ltd. Feb. 13, 1951 [Feb. 14, 1950], No. 3768/50. Class 40 (4). An arrangement for connecting any one of a plurality of inlets IT ... IT3, Fig. 1, to an outlet or any one of a plurality outlets OT1, OT2 comprises a 2 x 3 array of gas discharge tubes 13 . . . 15, 21 ... 23, each inlet being connected to the anodes of tubes in a corresponding column and each outlet being connected to cathodes of tubes in a corresponding row. When a striking voltage is applied to a column of tubes by the operation of one of the contacts 32 ... 34 only one tube of the column can strike due to the presence of a common anode resistance. Likewise when one tube in a row has been struck no other tube in the row can be struck due to the presence of a common cathode resistance. In a modification, Fig. 2, the inlets are connected to the cathodes and the outlets to the anodes, common anode resistors being supplied for the rows and common cathode resistors for the columns.
Patent GB-372396-A (GB)
Title: Improvements relating to loom shedding mechanism
IPC: D03C1/14
Filed: 1931-02-06
Abstract: 372,396. Loom shedding motions. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Crompton & Knowles Loom Works ; Worcester, Massachusetts, U.S.A.) Feb. 6, 1931, No. 3804. [Class 142 (i).] A device for supporting between the loom arches 10 the shafts 38 on which the harness sheaves 17 are mounted comprises a sheet metal support 20 having parallel arms with flanges 24 for engagement with the arch, and a slot 27 in the face 21 and in the arms for the reception and support of the shaft 38. The shaft has flats 39 to prevent its turning in the slot 27, while its underside has a notch 40 engaged by a screwed hook 37 having a tail 42 within the slot of the lower arm 23. The support is fixed in position on the arch by bolts 28 passing through a locking plate 29 having projections 31 for engagement in notches in a nut 33 for holding the screw 34, and hence the shaft 38, in correct vertical position.
Patent GB-909255-A (GB)
Title: Braking regulator
IPC: B60T8/1761
Filed: 1959-02-04
Abstract: 909,255. Fluid-pressure brakes. RECHERCHES ETUDES PRODUCTION. Feb. 4, 1959 [Feb. 4, 1958; Jan. 28, 1959], No. 4020/59. Class 103 (1). An anti-skid device provides, during braking, an electric signal the intensity of which is proportional to the difference between the intensity of a current which is a function of the rotational velocity of a braked wheel and that of a current which is a function of the rotational velocity corresponding to a deceleration equal to the maximum deceleration permissible to avoid skidding, the signal controlling the braking pressure. A generator 4, driven from wheel cap 6 and housed in stub axle 2, drives a generator 5 through a free wheel 7, a brake 8 being included to decelerate generator 5 corresponding to the maximum deceleration permissible to avoid skidding. Normally, the generators rotate together and the currents produced in circuit 9, 10 cancel out, but on skidding, generator 5 overruns generator 4 through flywheel 7, the resulting current acting through amplifier 11 on a solenoid-operated valve 24 to open it against spring 25 to release pressure liquid from the brake line 26, which pressure is normally controlled by lever 15 operating valve 14. In Fig. 2, not shown, a single generator in the stub axle has a rotor driven by the wheel cap and a stator driven from the shaft of the rotor through a free-wheel. Whilst in Fig. 3 a single D.C. generator 34 normally charges condenser 37 to produce a current f1 but should the wheel decelerate more quickly than the condenser discharges the point N will be at a higher potential than point M so producing a current f2 to establish brake release. Apparatus responsive to the electric signal to release the brakes is shown in Figs. 4 and 5. In Fig. 4 the signal operates a distributer 38 to supply pressure from conduit 39 to conduit 41 and chamber 42 of cylinder 43 to oppose the pressure on piston 44, 45 from the brake control pipe 49 to reduce the pressure in chamber 46 and brake pipe 48. In Fig. 5, electric apparatus 50 energized from source 54 receives a voltage from potentiometer 52 whose cursor 53 is positioned by the brake pedal to produce a signal i to move a waisted piston 60 from the shown normal position to connect brake pipe 58 to supply line 57; on skidding a signal a operates apparatus 50 to modify signal i to move piston 60 to connect brake pipe 58 to return pipe 59 to relieve braking pressure. A valve (Fig. 6, not shown) may be connected in the hydraulic pressure circuit to ensure a release of the brake more quickly than reapplication of the brake during very slippery conditions. A further control circuit is shown in Fig. 7 which renders the deceleration of a braked wheel constant.
Patent GB-163103-A (GB)
Title: Apparatus or appliances for playing a game
IPC: A63F9/20
Filed: 1920-02-10
Abstract: 163,103. Connold, R. M. Feb. 10, 1920. Drawings to Specification. Dominoes.-A set of twenty-eight dominoes is marked with the coloured devices of a heart, diamond, spade, club, crown, anchor, and star. Each device is marked twice on one domino and once only with each of the other devices on the remainder. By adding the devices of a crescent and horseshoe, the set may comprise forty-five dominoes. One of the devices may be replaced by a blank. Several methods of playing may be employed. For instance, one of the devices may be declared trumps and thereby take precedence. Reference has been directed by the Comptroller to Specification 14672/06.
Patent GB-511041-A (GB)
Title: Improvements in or relating to the descaling of metal articles
IPC: C25F1/06
Filed: 1938-02-09
Abstract: 511,041. Electrolytic pickling. ROBERTS, S. T., TAYLOR, F., and PALMER, E.C. Feb. 9, 1938, No. 4063. Drawings to Specification. [Class 41] Metals are descaled electrolytically by the use of direct current with superimposed alternating current. A ferrous article may be made cathode in a bath containing 20-80 per cent. by volume of sulphuric acid at a temperature of 40‹-150‹F with voltage 6-8 D.C. and superimposed 10 volts A.C., and with total current density 25-100 amps. R.M.S. per sq. ft. The bath may contain inhibitors. The A.C. voltage is applied to the electrolytic circuit by a tapped transformer. The D.C. generator may be connected to the circuit by a double pole double throw switch whereby the article may be connected for descaling as anode, or as anode and cathode in succession. Descaled steel articles, if they are not to be immediately further treated by galvanizing, painting or plating, are immersed in a solution of sodium nitrite (30 grams per litre) and allowed to dry in order to prevent rusting or oxidation.
Patent GB-548181-A (GB)
Title: Improvements in and relating to screw thread tapping machines and the like
IPC: B23B31/08
Filed: 1941-03-26
Abstract: 548,181. Tapping; drilling &c. GROOM & TATTERSALL, Ltd., and SALMONS, J. H. March 26, 1941, No. 4079. [Class 83 (iii)] Taps, drills &c. are driven through a self-aligning device embodying plate-like members connected by two sets of ribs and grooves at right angles. A member f is socketed at f for engagement with a spindle and is provided with a terminal disc b grooved at h to engage a rib i on an intermediate plate e having on its other face a rib at right-angles to the rib i and engaging a groove in a member a with a taper spigot c for mounting a tap-holder &c. The member a forms an oil bath enclosing the self-aligning parts and is fitted with a retaining ring g. Light springs, (not shown), tend to maintain the parts in concentric relation. In a modification the part a carries a bevelclosing chuck for engaging the tap shank and is fitted additionally with floating jaws for engaging and driving the squared end of the tap.
Patent GB-365353-A (GB)
Title: Improvements in or relating to pads for attachment to legs of furniture and the like
IPC: A47B91/04
Filed: 1931-02-10
Abstract: 365,353. Ferrules and tips for furniture legs &c. KINGSNORTH, W., 94, Lewisham Road, Lewisham, London. Feb. 10, 1931, No. 4122. [Class 134.] In pads for furniture legs &c. wherein a stem B of metal or other substance is adapted to be secured to the underside of the leg A as by a screw C and is formed with a flanged head D over which a resilient pad E of indiarubber is sprung, a facing F of felt or other soft material is provided on the rubber to facilitate sliding. The felt is attached to the rubber by vulcanizing, and its periphery may be scalloped.